If enacted, they would violate the 2020 deal that the United States inked with Canada and Mexico during Donald Trump’s first term.

President-elect Donald Trump on Monday promised massive hikes in tariffs on goods coming from Mexico, Canada and China starting on the first day of his administration, a policy that could sharply increase costs for American businesses and consumers.

Trump has announced that Canada and Mexico could soon see a 25 percent tariff added to all imported goods while China could face an additional 10 percent – something Trump says is part of an effort to curtail “crime and drugs” coming into the U.S. and slow the number of illegal border crossings.